[Antihypoxic effect of tisochromide (16-244) in comparison with piracetam]

The antihypoxic activity of Tisochromide (3-[4'-dimethylamino-4'-methylpentyl(2')-carbamoyl]-6,7-dimethoxy-1-thiaisochroman-1,1-dioxide), a substance of clinically antidepressant action, is studied on three hypoxia models and compared with that of the nootropic agent Piracetam: -- Tisochromide produces a dosis-dependent prolongation of the survival time of mice exposed to nitrogen hypoxia. -- The hypoxia-induced increase of lactate and pyruvate in the mouse brain is inhibited by this preparation. -- As to anoxia-induced electroencephalographic changes in the rat. Tisochromide increases the cerebral resistance against anoxia and shortens the isoelectric part of the encephalogram as well as the postanoxic phase of normalization.